EP 0984921 B1 20020918 - PROCESS FOR THE PREPARATION OF SUBSTITUTED KETO-ENAMINES
Title (en)
PROCESS FOR THE PREPARATION OF SUBSTITUTED KETO-ENAMINES
Title (de)
VERFAHREN ZUR HERSTELLUNG VON SUBSTITUIERTEN KETO-ENAMINEN
Title (fr)
PROCEDE DE PREPARATION DE CETO-ENAMINES SUBSTITUEES
Publication
Application
Priority
- US 9810458 W 19980519
- US 86295197 A 19970530
Abstract (en)
[origin: US5932766A] The present invention discloses a process for the preparation of a compound having formula 4: The process comprises the step of reacting an enolate having the formula: with a Grignard reagent. The enolate salt is formed in situ from the reaction of a protected ester wherein M is an alkali metal. R6 and R7 are each hydrogen or are independently selected from wherein Ra and Rb are independently selected from hydrogen, lower alkyl and phenyl and Rc, Rd and Re are independently selected from hydrogen, lower alkyl, trifluoromethyl, alkoxy, halo and phenyl; and wherein the naphthyl ring is unsubstituted or substituted with one, two or three substitutents independently selected from lower alkyl, trifluoromethyl, alkoxy and halo. Alternatively, R6 is as defined above and R7 is R12OC(O)- wherein R12 is benzyl; or R6 and R7 taken together with the nitrogen atom to which they are bonded form wherein Rf, Rg, Rh and Ri are independently selected from hydrogen, lower alkyl, alkoxy, halogen and trifluoromethyl.
IPC 1-7
IPC 8 full level
C07C 221/00 (2006.01); C07C 225/14 (2006.01); C07C 225/16 (2006.01)
CPC (source: EP US)
C07C 221/00 (2013.01 - EP US)
C-Set (source: EP US)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU NL PT SE
DOCDB simple family (publication)
WO 9854122 A1 19981203; AT E224357 T1 20021015; CA 2292399 A1 19981203; DE 69808075 D1 20021024; DE 69808075 T2 20030528; DK 0984921 T3 20030127; EP 0984921 A1 20000315; EP 0984921 B1 20020918; ES 2186160 T3 20030501; JP 2002501531 A 20020115; JP 4172660 B2 20081029; PT 984921 E 20030228; US 5932766 A 19990803
DOCDB simple family (application)
US 9810458 W 19980519; AT 98923656 T 19980519; CA 2292399 A 19980519; DE 69808075 T 19980519; DK 98923656 T 19980519; EP 98923656 A 19980519; ES 98923656 T 19980519; JP 50077399 A 19980519; PT 98923656 T 19980519; US 86295197 A 19970530